Keizo Nakanishi
type: MusicGroup
genre: enka
genre: j-pop
genre: kayokyoku
description: is a Japanese singer-songwriter and composer. He graduated from Okayama Prefectural Kurashiki Amagi High School and Nihon University College of Economics. In 2017, Nakanishi participated as a guest
popularity: 32
followers: 12381
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd2185f80168e9e56fcebc0c35306e5896b2426921fab43317762214275bef9d5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b75047d1-a6d3-4b13-9099-6d28f8645766.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b75047d1-a6d3-4b13-9099-6d28f8645766.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b75047d1-a6d3-4b13-9099-6d28f8645766
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2185f80168e9e56fcebc0c35306e5896b2426921fab43317762214275bef9d5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b75047d1-a6d3-4b13-9099-6d28f8645766.json and https://artists.proofprofile.net/proofs/artist/b75047d1-a6d3-4b13-9099-6d28f8645766.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
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album: タンジェリン・アイズ
  type: MusicAlbum
  date published: 1991-03-25
album: Tangerine eyes
  type: MusicAlbum
  date published: 1991-03-25
album: KEIZO-かなわない夢もあった
  type: MusicAlbum
  date published: 1991-05-25
album: KEIZO-かなわない夢もあった
  type: MusicAlbum
  date published: 1991-05-25
album: KEIZO Kanawanai yumemo atta
  type: MusicAlbum
  date published: 1991-05-25
album: KEIZO-かなわない夢もあった
  type: MusicAlbum
  date published: 1991-05-25
album: Kataomoino birthday
  type: MusicAlbum
  date published: 1991-11-25
album: 片想いのバースデー
  type: MusicAlbum
  date published: 1991-11-25
album: Woman
  type: MusicAlbum
  date published: 1992-01-22
album: Woman
  type: MusicAlbum
  date published: 1992-01-22
album: Woman
  type: MusicAlbum
  date published: 1992-01-22
album: yell
  type: MusicAlbum
  date published: 1992-03-25
  track: Woman
    type: MusicRecording
    duration: PT4M52S
    duration ms: 292933
    explicit: false
    by artist: Keizo Nakanishi
    in album: yell
      type: MusicAlbum
      date published: 1992-03-25
    genre: enka
    genre: j-pop
    genre: kayokyoku
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    additional property: CopyrightID
    additional property: CopyrightStatus
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    additional property: CopyrightRegisteredAt
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    additional property: CopyrightChainExplorerURL
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      value: https://explorer.copyrightchains.com/tx/0xfaa358ac95cc8cd9b1489cb3accc2addf0bca85b13a5cc82270429261f488672
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200050
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa358ac95cc8cd9b1489cb3accc2addf0bca85b13a5cc82270429261f488672. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200050.
      date published: 2026-07-05T19:27:56Z
    audio: Woman
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
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      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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        type: PropertyValue
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      additional property: Valence (Positivity)
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        type: PropertyValue
        value: -9.397
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        type: PropertyValue
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album: yell
  type: MusicAlbum
  date published: 1992-03-25
  track: 君が瞳にしみる
    type: MusicRecording
    duration: PT5M26S
    duration ms: 326733
    explicit: false
    by artist: Keizo Nakanishi
    in album: yell
      type: MusicAlbum
      date published: 1992-03-25
    genre: enka
    genre: j-pop
    genre: kayokyoku
    isrc code: JPPI02300440
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
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      value: https://explorer.copyrightchains.com/tx/0x81c070bacdbaeafde7fe6f1a4fa4436ec26902a5315f3d0fe57ab385646f7fd0
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959069
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300440
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: 君が瞳にしみる
  track: 君は君の誇り
album: Ticket to paradise
album: あの空を忘れない
album: Anosorawo wasurenai
album: 君のいる星
album: Kiminoiruhoshi
album: YOU and I
album: Steps
album: 眠れぬ想い
album: Nemurenu omoi
album: Tattahitotsunoaiwo
album: たつたひとつの愛を
album: A.C.E.
album: Starting Over
album: 非情階段(Hyper-Radio MIX）
album: 非情階段(Radio MIX）
album: Hijou kaidan (Radio MIX)
album: Hijou Kaidan (Hyper-Radio MIX)
album: 非情階段 (Radio MIX)
album: Kiss,Merry X'mas
album: SINGLES
album: SO BAD
album: graffiti
album: Why Goodbye Single mix
album: MUST BE HEAVEN
album: Happy Ever After
album: 次の夢/星に願いを
album: Tsugino yume/Hoshini negaiwo
album: Sorezoreno chiheisen
album: それぞれの地平線
album: Spinning
album: What I Do For Love
album: Aiwaima
album: 愛はいま
album: Negai
album: 願い
album: Stay Gold
album: Meikyuno rakuen(BREAK OUT MIX)/SON OF THE SUN
album: 迷宮の楽園(BREAK OUT MIX)/SON OF THE SUN
album: JACK-IN-THE-BOX '98
album: SONGS
album: Kazenotobira
album: 風の扉
album: SELECTION Blood Type <AB>
album: HIGHER SELF
album: Moonlight Groove
album: Touch of your lips
album: Sunshine Groove
album: bug

OTSTimestamp
type: PropertyValue
value: 2026-07-22T01:18:02Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c070bacdbaeafde7fe6f1a4fa4436ec26902a5315f3d0fe57ab385646f7fd0. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:18:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300440.
date published: 2026-07-22T01:18:02Z

君が瞳にしみる
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 78.922
additional property: Musical Key
  type: PropertyValue
  value: 3
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.421
additional property: Energy
  type: PropertyValue
  value: 0.451
additional property: Speechiness
  type: PropertyValue
  value: 0.028
additional property: Acousticness
  type: PropertyValue
  value: 0.472
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.104
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.248
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.985
additional property: Key Name
  type: PropertyValue
  value: Eb
additional property: Mode Name
  type: PropertyValue
  value: Major

君は君の誇り
type: MusicRecording
duration: PT4M51S
duration ms: 291533
explicit: false
by artist: Keizo Nakanishi
in album: yell
  type: MusicAlbum
  date published: 1992-03-25
genre: enka
genre: j-pop
genre: kayokyoku
isrc code: JPPI02300500
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T15:48:49+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf1d68d5a5e15a5cf938821dbc58ce9d4426235ec748d376e04c9b0c68dd07829
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959031
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300500
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T18:50:24Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d68d5a5e15a5cf938821dbc58ce9d4426235ec748d376e04c9b0c68dd07829. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:50:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300500.
  date published: 2026-07-21T18:50:24Z
audio: 君は君の誇り
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.946
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.591
  additional property: Energy
    type: PropertyValue
    value: 0.888
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.011
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.14
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.932
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor

yell
type: MusicAlbum
date published: 1992-03-25

yell
type: MusicAlbum
date published: 1992-03-25

Ticket to paradise
type: MusicAlbum
date published: 1992-07-29

Ticket to paradise
type: MusicAlbum
date published: 1992-07-29

Ticket to paradise
type: MusicAlbum
date published: 1992-07-29

あの空を忘れない
type: MusicAlbum
date published: 1992-10-28

Anosorawo wasurenai
type: MusicAlbum
date published: 1992-10-28

君のいる星
type: MusicAlbum
date published: 1992-10-28

君のいる星
type: MusicAlbum
date published: 1992-10-28

Kiminoiruhoshi
type: MusicAlbum
date published: 1992-10-28

YOU and I
type: MusicAlbum
date published: 1993-01-27

YOU and I
type: MusicAlbum
date published: 1993-01-27

YOU and I
type: MusicAlbum
date published: 1993-01-27

Steps
type: MusicAlbum
date published: 1993-03-03

Steps
type: MusicAlbum
date published: 1993-03-03

Steps
type: MusicAlbum
date published: 1993-03-03
track: あの空を忘れない
  type: MusicRecording
  duration: PT4M5S
  duration ms: 245133
  explicit: false
  by artist: Keizo Nakanishi
  in album: Steps
    type: MusicAlbum
    date published: 1993-03-03
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI02300740
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
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    value: 2026-07-19T17:08:01+00:00
  additional property: CopyrightChainExplorerURL
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    value: https://explorer.copyrightchains.com/tx/0xb17381cb5c6e6c5bcd1fdf498b88a5bed6de9b8314dd069c13600686af7aeb9e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958761
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300740
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T20:07:34Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17381cb5c6e6c5bcd1fdf498b88a5bed6de9b8314dd069c13600686af7aeb9e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300740.
    date published: 2026-07-19T20:07:34Z
  audio: あの空を忘れない
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 143.993
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.457
    additional property: Energy
      type: PropertyValue
      value: 0.687
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.533
    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.198
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.873
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Steps
type: MusicAlbum
date published: 1993-03-03
track: 青い影
  type: MusicRecording
  duration: PT4M56S
  duration ms: 296493
  explicit: false
  by artist: Keizo Nakanishi
  in album: Steps
    type: MusicAlbum
    date published: 1993-03-03
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI02300760
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T22:21:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x269047f8f6d4ea4a8fe073aacd805264383e799daf7a676ec0c218658d6810f9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958489
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958489
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300760
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T04:13:26Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269047f8f6d4ea4a8fe073aacd805264383e799daf7a676ec0c218658d6810f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300760.
    date published: 2026-07-18T04:13:26Z
  audio: 青い影
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.273
    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
      value: 0.089
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.695
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.573
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 君のいる星
  type: MusicRecording
  duration: PT4M24S
  duration ms: 264266
  explicit: false
  by artist: Keizo Nakanishi
  in album: Steps
    type: MusicAlbum
    date published: 1993-03-03
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI02300800
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T17:56:50+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x286455d297bcb3553e6da5116c4090a3680b02787582206b0edcaaae705f25f7
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958185
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958185
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300800
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T18:19:04Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286455d297bcb3553e6da5116c4090a3680b02787582206b0edcaaae705f25f7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02300800.
    date published: 2026-07-15T18:19:04Z
  audio: 君のいる星
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 111.979
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.691
    additional property: Energy
      type: PropertyValue
      value: 0.737
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.229
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.078
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.816
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.728
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major

眠れぬ想い
type: MusicAlbum
date published: 1993-07-28

Nemurenu omoi
type: MusicAlbum
date published: 1993-07-28

眠れぬ想い
type: MusicAlbum
date published: 1993-07-28

Tattahitotsunoaiwo
type: MusicAlbum
date published: 1993-11-25

たつたひとつの愛を
type: MusicAlbum
date published: 1993-11-25

A.C.E.
type: MusicAlbum
date published: 1994-02-23

A.C.E.
type: MusicAlbum
date published: 1994-02-23

A.C.E.
type: MusicAlbum
date published: 1994-02-23

Starting Over
type: MusicAlbum
date published: 1994-03-23

Starting Over
type: MusicAlbum
date published: 1994-03-23
track: たったひとつの愛を
  type: MusicRecording
  duration: PT5M4S
  duration ms: 304066
  explicit: false
  by artist: Keizo Nakanishi
  in album: Starting Over
    type: MusicAlbum
    date published: 1994-03-23
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI02301040
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T23:22:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd5ec24142e30382eb511f9a1c50a1806d8de856e1705c4e2891adcb231f3ebf0
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957775
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957775
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02301040
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-13T00:04:23Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec24142e30382eb511f9a1c50a1806d8de856e1705c4e2891adcb231f3ebf0. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02301040.
    date published: 2026-07-13T00:04:23Z
  audio: たったひとつの愛を
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 77.068
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.515
    additional property: Energy
      type: PropertyValue
      value: 0.685
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.344
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.241
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.243
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.734
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Starting Over
type: MusicAlbum
date published: 1994-03-23

Starting Over
type: MusicAlbum
date published: 1994-03-23
track: A.C.E.
  type: MusicRecording
  duration: PT4M12S
  duration ms: 252693
  explicit: false
  by artist: Keizo Nakanishi
  in album: Starting Over
    type: MusicAlbum
    date published: 1994-03-23
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI02301000
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T05:28:57+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x82b5edcd3a9bd31df263d437f41b50a3f3ed63456c6d99fca6edc29408c224c5
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956776
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956776
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02301000
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T10:59:37Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5edcd3a9bd31df263d437f41b50a3f3ed63456c6d99fca6edc29408c224c5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI02301000.
    date published: 2026-07-05T10:59:37Z
  audio: A.C.E.
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 104.892
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.697
    additional property: Energy
      type: PropertyValue
      value: 0.865
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.189
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.378
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.7
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.513
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

非情階段(Hyper-Radio MIX）
type: MusicAlbum
date published: 1994-07-27

非情階段(Radio MIX）
type: MusicAlbum
date published: 1994-07-27

Hijou kaidan (Radio MIX)
type: MusicAlbum
date published: 1994-07-27

Hijou Kaidan (Hyper-Radio MIX)
type: MusicAlbum
date published: 1994-07-27

非情階段 (Radio MIX)
type: MusicAlbum
date published: 1994-07-27

Kiss,Merry X'mas
type: MusicAlbum
date published: 1994-11-25

Kiss,Merry X'mas
type: MusicAlbum
date published: 1994-11-25

Kiss,Merry X'mas
type: MusicAlbum
date published: 1994-11-25

SINGLES
type: MusicAlbum
date published: 1994-12-07
track: Ticket To Paradise
  type: MusicRecording
  duration: PT4M50S
  duration ms: 290226
  explicit: false
  by artist: Keizo Nakanishi
  in album: SINGLES
    type: MusicAlbum
    date published: 1994-12-07
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI09200070
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xaf38b1591c05304314d741727d255eadef2cc27f9ba0e6f269432649494ea599
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957770
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957770
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200070
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T23:17:00Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38b1591c05304314d741727d255eadef2cc27f9ba0e6f269432649494ea599. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200070.
    date published: 2026-07-12T23:17:00Z
  audio: Ticket To Paradise
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.011
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.7
    additional property: Energy
      type: PropertyValue
      value: 0.952
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.139
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.311
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.968
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.878
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

SINGLES
type: MusicAlbum
date published: 1994-12-07

SINGLES
type: MusicAlbum
date published: 1994-12-07

SINGLES
type: MusicAlbum
date published: 1994-12-07
track: Woman
  type: MusicRecording
  duration: PT4M54S
  duration ms: 294160
  explicit: false
  by artist: Keizo Nakanishi
  in album: SINGLES
    type: MusicAlbum
    date published: 1994-12-07
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI09200050
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T01:37:28+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfaa358ac95cc8cd9b1489cb3accc2addf0bca85b13a5cc82270429261f488672
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200050
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa358ac95cc8cd9b1489cb3accc2addf0bca85b13a5cc82270429261f488672. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200050.
    date published: 2026-07-04T10:04:33Z
  audio: Woman
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 91.983
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.614
    additional property: Energy
      type: PropertyValue
      value: 0.798
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.131
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.075
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.442
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.364
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Ticket To Paradise
  type: MusicRecording
  duration: PT4M50S
  duration ms: 290226
  explicit: false
  by artist: Keizo Nakanishi
  in album: SINGLES
    type: MusicAlbum
    date published: 1994-12-07
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI09200070
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T22:34:42+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xaf38b1591c05304314d741727d255eadef2cc27f9ba0e6f269432649494ea599
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957770
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957770
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200070
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T23:17:00Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38b1591c05304314d741727d255eadef2cc27f9ba0e6f269432649494ea599. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09200070.
    date published: 2026-07-12T23:17:00Z
  audio: Ticket To Paradise
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.011
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.7
    additional property: Energy
      type: PropertyValue
      value: 0.952
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.139
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.311
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.968
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.878
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 非情階段 - Radio MIX
  type: MusicRecording
  duration: PT4M17S
  duration ms: 257893
  explicit: false
  by artist: Keizo Nakanishi
  in album: SINGLES
    type: MusicAlbum
    date published: 1994-12-07
  genre: enka
  genre: j-pop
  genre: kayokyoku
  isrc code: JPPI09403251
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T07:12:40+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe39c71a9dfe96a86c03412b15ee34ec8a89e693bb71900aa92c1bed26322b0a2
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: 非情階段 - Radio MIX

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 958520

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958520

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPI09403251

OTSTimestamp
type: PropertyValue
value: 2026-07-18T08:19:09Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
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date published: 2026-07-18T08:19:09Z

非情階段 - Radio MIX
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SO BAD
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date published: 1995-08-23

SO BAD
type: MusicAlbum
date published: 1995-08-23

SO BAD
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date published: 1995-08-23

graffiti
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date published: 1995-09-21

graffiti
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date published: 1995-09-21
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-20T07:50:41Z
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graffiti
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date published: 1995-09-21

graffiti
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date published: 1995-09-21

Why Goodbye Single mix
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date published: 1995-11-22

Why Goodbye Single mix
type: MusicAlbum
date published: 1995-11-22

Why Goodbye Single mix
type: MusicAlbum
date published: 1995-11-22

MUST BE HEAVEN
type: MusicAlbum
date published: 1996-02-10

MUST BE HEAVEN
type: MusicAlbum
date published: 1996-02-10

Happy Ever After
type: MusicAlbum
date published: 1996-08-10

Happy Ever After
type: MusicAlbum
date published: 1996-08-10

次の夢/星に願いを
type: MusicAlbum
date published: 1996-10-10

Tsugino yume/Hoshini negaiwo
type: MusicAlbum
date published: 1996-10-10

次の夢/星に願いを
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date published: 1996-10-10

Sorezoreno chiheisen
type: MusicAlbum
date published: 1997-01-10

それぞれの地平線
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date published: 1997-01-10

それぞれの地平線
type: MusicAlbum
date published: 1997-01-10

Spinning
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date published: 1997-01-29
track: 次の夢
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  genre: enka
  genre: j-pop
  genre: kayokyoku
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-17T19:12:23Z
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Spinning
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date published: 1997-01-29

Spinning
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date published: 1997-01-29

Spinning
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date published: 1997-01-29

What I Do For Love
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date published: 1997-02-26

Aiwaima
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date published: 1997-09-24

愛はいま
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date published: 1997-09-24

愛はいま
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date published: 1997-09-24

Negai
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date published: 1998-02-04

願い
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date published: 1998-02-04

願い
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date published: 1998-02-04

Stay Gold
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date published: 1998-02-25

Stay Gold
type: MusicAlbum
date published: 1998-02-25

Stay Gold
type: MusicAlbum
date published: 1998-02-25

Stay Gold
type: MusicAlbum
date published: 1998-02-25

Meikyuno rakuen(BREAK OUT MIX)/SON OF THE SUN
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date published: 1998-07-29

迷宮の楽園(BREAK OUT MIX)/SON OF THE SUN
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date published: 1998-07-29

迷宮の楽園(BREAK OUT MIX)/SON OF THE SUN
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date published: 1998-07-29

JACK-IN-THE-BOX '98
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date published: 1998-11-05

JACK-IN-THE-BOX '98
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date published: 1998-11-05

SONGS
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date published: 1998-11-26
track: Choo Choo TRAIN
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-19T07:14:39Z
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track: Timing
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-18T08:19:09Z
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SONGS
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SONGS
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SONGS
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date published: 1998-11-26

Kazenotobira
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風の扉
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SELECTION Blood Type <AB>
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date published: 1999-06-23

SELECTION Blood Type <AB>
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date published: 1999-06-23

SELECTION Blood Type <AB>
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date published: 1999-06-23

SELECTION Blood Type <AB>
type: MusicAlbum
date published: 1999-06-23

HIGHER SELF
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date published: 1999-08-25

HIGHER SELF
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date published: 1999-08-25

Moonlight Groove
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date published: 1999-10-27

Moonlight Groove
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date published: 1999-10-27

Moonlight Groove
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date published: 1999-10-27

Moonlight Groove
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date published: 1999-10-27

Touch of your lips
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date published: 1999-11-25

Touch of your lips
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date published: 1999-11-25

Sunshine Groove
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date published: 1999-12-15

Sunshine Groove
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date published: 1999-12-15

Sunshine Groove
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date published: 1999-12-15

Sunshine Groove
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date published: 1999-12-15

bug
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date published: 2000-02-16

bug
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date published: 2000-02-16

bug
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date published: 2000-02-16

SINGLES Ⅱ
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date published: 2000-09-27
track: MUST BE HEAVEN
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-04T02:06:47Z
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SINGLES (Ⅱ)
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SINGLES (II)
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SINGLES Ⅱ
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KEIZO NAKANISHI complete BEST SELECTION~Choo Choo TRAIN~
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KEIZO NAKANISHI complete BEST SELECTION～Choo Choo TRAIN～
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KEIZO NAKANISHI complete BEST SELECTION～Choo Choo TRAIN～
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KEIZO NAKANISHI complete BEST SELECTION～Choo Choo TRAIN～
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date published: 2004-02-04

Best Selection
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date published: 2006-03-22

Best Selection
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date published: 2006-03-22

Best Selection
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date published: 2006-03-22

Best Selection
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date published: 2006-03-22

LIGHT HOUSE OF LOVE
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date published: 2006-11-22

中西圭三 バースデーライブ
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date published: 2016

Goods for you.
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date published: 2016-09-07

BABY
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date published: 2021-09-10

BABY
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date published: 2021-09-10

ドラマチック・プログラム
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date published: 2022-12-19

SWEET INSPIRATION
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by artist: Freedom Gospel Choir
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by artist: Ken Hirai
by artist: Harumi Tsuyuzaki
by artist: Michico
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audio: SWEET INSPIRATION
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Timing with 中西圭三 (EDM Remix)
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Timing with 中西圭三
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  date published: 2026-07-08T03:20:19Z
audio: Timing with 中西圭三
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